Improvement in machines for sharpening saws



4 Sheets-Sheet 1.

W. L; COVEL. Machine for Sharpening Saws.

.No. 222.386. Patented Dec. 9, I879.

WITNESSES M! 2322 ATTORNEY NJPETERS, PHDTO-UTHdGfiAPHER, WAQHINGTON. D c.

4 Sheets-Sheet 2.

W. L. 0 0 VEL. Machine for Sharpening Saws.

Patented Dec. 9, I879.

INVENTOR WITNESSES ATTORNEY N.PETERS. PHOTO-LITHOGRAPHER. WASHINGTON, D c.

4 Sheets--Sheet 3. W. L, GOVEL. Machine for Sharpening Saws.

No. 222,386. Patented Dec. 9, I879.

ZWITNESSES. I 0? wR Wm! M ATTORNEY N. PETERS. PHOTO-LITHUGRAPHER. WASHINGTON. D c.

- 4 Sheets-Sheet, 4,

W. L. G-OVEL. Machine for Sharpening Saws. No. 222,386. Patented Dec. 9, 1879.

i o I l tWITINESSES M wag INYENTOR ATTOR N EY N. Prms. PHommuocnAPn'zR, WAsnmsroN. o. c.

.ing machine.

, cally.

WILL AM. L. OOVEL, on nnnorr, WISCONSIN.

IMPROVEMENT IN MACHINES FOR SHARPENING SAWS};

Specification forming part of LettersPatent No. 222,386, dated December 9, 1879;

December 16, 1876.

To all whom it may concern:

Be it known that I, WILLIAM L. CQV'EL, of Beloit,'in the county of Rock and State of Wisconsin, have invented a new and valuable Improvement in Machines for Sharpening a Saws and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of thesame,

reference being had to the annexed drawings,

making a part of this specification, and to the, letters and figures of-reference marked there sentations of side views of my saw-sharpen- My inventionrelates to improvements in machlnes for sharpeningzmill-saws automati- The object of the invention is, principally, to

deyise an apparatus which,\vhen once adjusted, will automatically sharpen all the teeth without further attention making them identicallythe same in-shap'e, pitch, or, hook, and

" which will be capable ofeasy adjustment to sharpenteeth of any of the. usual sizesor shapesf- L The nature of myinv entionwill be fully understood from the followingdescription. 5

Themain frame of my machine is-indicate'd in.

the drawings by the letter A, and at or near themiddle of itsheightaftbrds beari'ngsisfor a longitudinaldriving-shaft, B, @This shaft will haveon its=innerendalarge grooved pulley-wheel,la,and;.on";its outer enda driv-:

1 ing-cranlna. f i B represents a transverse l shafthaving its hearings at one end in the side ofthe frame, and at the other in a vertically-vibratin g lever, G, of

thefirst degree. When thepower end of this 1 lever is depressed agear-wheel, 1), upon shaft. B will engage with a worm, 1;, upon asecond i longitudinal shaft, B at the upper-edge of the frame; and if an endlessbelt bepassed around the pulley-wheel a, anda small pulley,

0, upon the inner end of the worm-shaft, mo-

tion will be communicated to the latter from shaft B, whence it will betransmitted tothe shaft B. Shaft B will have upon its end next the emery-wheel a metallic disk, D, provided with a convolute slot, d, by means of which,

Figures 1 and 2 of the drawings are repre- Fig.3is atop view thereof and. i Figs. 4, 5, 6, and 7 aredetails. 1 1

application filed and aclamp-pin, d, a metallic rod, D, 'in the nature of a pitman, is adjustably secured there I to. i

E, represents a metallic lever securedjby. means of a link-rod, e, to the frame, and pin oted at the other to the lower end of the pit manrod D. 3 At or near the middle of the length of .rod E an endwise-movable{and r0 rating rod, E, is pivoted, which is sustained and guided in its movements by spaced brack ets w to, through which it passes, andis pro vided at its upper end with a crank-arm, (0

medium of the crank disk D, pitman Dgthe rod E, the. endwise-movable adjuster-rodE, and the screw -threaded block 13 on the carriage G, theother end being raised iby means of a rope or chain,f, secured at one endto the said block, passing thence downwardaround a pulley, g. thence upward diagonallyacross the frameside, over a pulley, g whence-it descends to andtis attaehed to the remaining endlof the As the block F accompanies the" movements of the adjuster-rod it Wilhthrough ithemedium of the'rope and pulleysfg, raise or lower one end of the carriage at thesame time and to the same extent as the saidfadf ,juster-rod raises or lowers the other yconse qnently the saw will move vertically, up; to? and downfrom the emery-wheel, and steam,

carriage.

will be evenly and equally sharpened, The

successive teeth are automaticallygsubjected to the emery-wheel by the following'mechanism A roek-shaft, H, having at one endfa crank-arm, h, and at the other a crankarm,

h", will be mounted transversely on frame A,

1 near the adjuster E. "avertically-vibrating arm, H, pivoted-"at its Arm It will bejoinedto lower end to the side, of the frame bymeans I of a connecting-rod, I, which latter will, have.

a wrist-pin connection with arinh, andfwill be pi votally and ad 3' ustabl y connected tojarm H.

This.v arm will have a curved slot,jt,vin its length and a rounded spur, i, whieh isheld into engagement with a cam, J, on theadja- 1 cent end of shaft B by means of V a ;spring, S.

The middle portion of rod E is screw-threaded at 5, and extends through a female thream ed block, F, rigidly securedtooneend-of a carriage, G, which sustains the saw. 1 By roy tatingshaft B, oneend of the carriagewill I bealternately raised and lowered through the The arm h of the rock-shaft II will be provided with a vertically-vibrating and adjustable feed-finger, K, the free end of which is transversely hooked and overlies the. edge of the saw in the throat of the teeth. The rotation of shaft B will, by means of the cam, the connecting-rod, and slotted arm H, impart a rocking movement to the shaft H, and, through the medium of the arm h, actuate the feedfinger K and impart an intermittent rotation to the saw. This rotation may be regulated so as to bring a fresh tooth up against the emery-wheel by lengthening or shortening the throw of the feed-finger.

Rod I, before mentioned, is adjustably secured to arm'H by means of a bolt, j, passing through slot iin the said arm and an eye in the said rod, and a hand-nut, j, clamping them together. Should the throw of the feedfinger prove too great I loosen nut j and lower rod I in slot 2' until the said finger takes its place against theface of the tooth next to be sharpened. Shaft B being then turned over, the feed-finger should push the tooth a short distance beyond the emery-wheel; but should it fall short of this I lengthen the feed-finger as follows: Its end farthest from the saw will be screw-threaded, as shown at 1' and will pass through a nut, i, rotating in bearings in one end of a plate, j The body of the feedfinger will be prismatic and will pass through a perforation in the remaining arm of plate j,

. of corresponding form.

By operating the nut i the feed-finger may be extended or retracted, as the case may be,

thus securing avery exact regulation of the same. Plate j will vibrate vertically on the upper end of arm h, and will have a horizontal screw-threaded lug, is, provided with an adjusting thumb-screw, k, the lower end of which bears upon a shelf, k upon the arm h. By means of this screw the feed-finger may be held in proper position for engaging with the teeth of the saw accurately.

Cam J will be readily detachable from the end of the shaft B, and a cam of different shape substituted therefor, which will cause a difi'erently-shaped tooth to be given to the saw, as these cams serve not only to actuate the feed-finger, but, by limiting or increasing its throw, act as formers.

Three or more of the former-cams will be allotted to each machine, so that every variety of saw-tooth may be sharpened.

The carriage G, before described, will have the end sustained by rope f, extended through a slot, 17, formed at the frame-side, so as to be guided in its vertical movements, and will be provided with a longitudinal slot, 1, in which the tang of the centering-cone seat at will be adjustably secured by means of a clamp-nut. The seat at will be concave, and has a screwthreaded central bolt, m, upon which the centering-cone 0 and two hand-nuts, 0, will be applied for the purpose of securing the saw to the carriage. On this carriage a dovetailed guide-strip, K, is arranged, the same being pivoted at one end to the carriage, as shown at p, and connected adjustably at the other to an arm, K of the'carriage, having a curved slot, 0, by means of a set-screw, 19 This guide-strip carries an adjustable slide, L, havin g on its en d a gravitatin g cam-lever, L, which bears upon the face of the circular saw, and prevents it from vibrating during the act of sharpening.

The cone-seat and slide are both removable, and the guide-strip K is then serviceable as a Way or track for a pitsaw carrier, M, having spaced clamps q for securing the saw to it. This carrier will have a dovetail groove, 0', upon its rear face, of such a size as to receive the way or track and allow the carrier to have free endwise movement thereon, so that the feed-finger will, as above described, be allowed to give the saw-carrierendwise movement and bring the teeth of the saw successively against the emery-wheel N. a

By looseningset-serew p and raising onlowerin g the free end of the guide-strip until the desired adjustment is obtained, and reapplying the said set-screw, the pitch of thesawteeth may be increased at pleasure.

In order that thecuttingedge of the sawteeth may be transversely beveled I have devised the following:

The shaft N of the emery-wheel N'will have its bearings in a horizontally-vibrating plate, 0, pivoted at its endnext the emery-wheel to a horizontal offset, 8, of the frame, and having its free end extended through two spaced perforated horizontallyarranged guides, t, projecting from the frame. The free end of plate 0 will have a perforation, m, which will register with spaced perforations y in the guides t,- and by passing a lock-pin, a, through the guide and plateO, thelatter, and consequently the emery-wheel, will be adjusted so as to give the same bevel to the cutting-edge of the saw-teeth, and this bevel may beincreased or diminished, as may be required, by swinging arm or plate 0 more or less, as may be requisite.

The collar 10 against which the emery-wheel N is clamped, is peripherally grooved and serves as a pulley, whereby motion is communicated from the cone-pulley won shaft B directly through an endless belt, P, or indirectly through two "spaced pulleys, 4 4, havingtheir bearings in a laterally-projecting arm, Q, of the frame. 7

Slide L, before alluded to, will be provided with a forked end, z, adapted to receive the edge of the circular saw, and the action of the cam-leverL will jam it against a metallic spur, z, projecting from the inner arm of-the=said fork z, thus not only holding the saw against lateral vibration, butalso preventing the saw from rotating while subjected to the action of the emery-wheel. Lever G will have in its free end a longitudinal slot,1,in which aspur, 2, in the nature of a wrist-pin, on a vertically- Vibrating operating -lever, B, having its fulcrum on frame A, will engage. By elevating the power-arm of lever B, whose fulcrum is below the level of lever O, the gear-wheel b on shaftB will become engaged with the worm t b onshaft 13, a reverse movement of lever B p having the opposite eflect.

The e'ndwise movable rod E will have its lower bearin g in a saddle, T, to which the lever E is pivoted, by means of which the said.

and is allowed to rotate freely, and the lever to vlbrate vertically, a universal o1 knuckle joint being thus made.

\Vhat I claim as new, and desire to secure by Letters Patent, is

l 1. The combination, with a mechanism for i f rotating an emery-wheel, of the shaft B, disk D, having convolute slotd, the adjustable pitman D, leverE,the endwise-movableand rotati in g screw-rod E, the carrier Gr, having threaded block F, the 'chain or rope f, and the pulleys Pg 9 substantially as specified.

1 2. The carriage G and a dovetailed guidestrip, K, pivoted to the carriage at one end a p andadjustably secured toit at the other, com-- bined substantially as specifiedg" 3. The carriage G, having a longitudinal a slot, Z, a slotted end piece, K the vibrating f and adjustable guide-strip K and aset-screw, 0", adapted for use substantially as specified.

4. The combination, with the screw -threaded rod E and the carriage having the threaded block F, receiving the said rod, of the rope or chain f, the pulleysg g ,the lever E, pitman D, crank-disk' D, and shaftB, substantially 5. Thecombination, with the shaft ta ingthe cam-former J of the vertically-vibrating arm H, having spur i and curved slot '5,

q f the connecting-rod I, the rock-shaft H, and the vibrating and adjustable feed finger K,

.substantiallyas specified. i i

6. Thecombination, with the arm h of the l rock-shaft, having a ledge, k of the vibrating feed-finger K and. an adjusting-screw, k, for increasing or lessening the inclination ofsaid finger, substantially as specified.

7.'In combination with the rock-shaft H, having arms 71. h, and the feed-finger K,the connecting-rod I, the slotted arm H, having spur i, the cam-former J, rotary shaft B, and A its actuating devices, substantially as specified.

8.. The combination, with the rock-shaft H,

arm h, and the vertically-vibratingslotted lever H, of 'the connecting-rod I, pivoted tothe arm h and adjustably secured to the said lever, substantially as specified. y i 9. In combination with the emery-wheel N and its shaft N, the plate 0, afl'ording bear ings for the said shaft, pivoted at its frontend' to the frame and extended between guides tt,

having spaced perforations y, substantially as and for the purpose specified. i

10. The slide L, having a forked end, 2',

adapted to receive the edge of a circular saw,

and provided with a spur, z, and aygravitat ing cam-lever, L, combined and arranged substantially'as specified. i

11. The combination, with the carriage G,

having a dovetailed guideway-strip, K, of the v pit-saw clamp M, having a dovetail groove, 4, on one of its faces adapted to receivcthesaw strip, substantially as specified.

12. In combination with the carriage G, having longitudinal slot 1 and guide strip K,the

concavecentering-cone seat m and the clamp jslide L, respectively-secured removably 1n thesaid groove and on the said strip, substanv tially as specified.

, In testimony that I claim the above U hereunto subscribed my name in the presence WILLIAM ncov in I of two witnesses.

Witnesses:

CHAS. F. VAN HORN, ALLEN H. GANGEWER. 

